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			<h1>jQuery UI 实例 - <span class="color_h1">自动完成（Autocomplete）</span></h1>


<p>根据用户输入值进行搜索和过滤，让用户快速找到并从预设值列表中选择。</p>
<p>如需了解更多有关 autocomplete 部件的细节，请查看 API 文档 <a href="../jqueryui/api-autocomplete.html">自动完成部件（Autocomplete Widget）</a>。</p>
<p>本章节使用到 <a href="https://static.runoob.com/download/search.php" download>search.php 下载</a>。</p>


<h2>默认功能</h2>
<p>当您在输入域中输入时，自动完成（Autocomplete）部件提供相应的建议。在本实例中，提供了编程语言的建议选项，您可以输入 "ja"  尝试一下，可以得到 Java 或 JavaScript。</p>
<p>数据源是一个简单的 JavaScript 数组，使用 source 选项提供给部件。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 默认功能&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;script&gt;
  $(function() {
    var availableTags = [
      "ActionScript",
      "AppleScript",
      "Asp",
      "BASIC",
      "C",
      "C++",
      "Clojure",
      "COBOL",
      "ColdFusion",
      "Erlang",
      "Fortran",
      "Groovy",
      "Haskell",
      "Java",
      "JavaScript",
      "Lisp",
      "Perl",
      "PHP",
      "Python",
      "Ruby",
      "Scala",
      "Scheme"
    ];
    $( "#tags" ).autocomplete({
      source: availableTags
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="tags"&gt;标签：&lt;/label&gt;
  &lt;input id="tags"&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>包含重音</h2>
<p>autocomplete 域使用自定义的 source 选项来匹配带有重音字符的结果项，即使文本域不包含重音字符也会匹配。但是如果您在文本域中键入了重音字符，则不会显示非重音的结果项。</p>
<p>尝试键入 "Jo"，会看到 "John" 和 "Jörn"，然后 键入 "Jö"，只会看到 "Jörn"。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 包含重音&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;script&gt;
  $(function() {
    var names = [ "J&ouml;rn Zaefferer", "Scott Gonz&aacute;lez", "John Resig" ];
 
    var accentMap = {
      "&aacute;": "a",
      "&ouml;": "o"
    };
    var normalize = function( term ) {
      var ret = "";
      for ( var i = 0; i &lt; term.length; i++ ) {
        ret += accentMap[ term.charAt(i) ] || term.charAt(i);
      }
      return ret;
    };
 
    $( "#developer" ).autocomplete({
      source: function( request, response ) {
        var matcher = new RegExp( $.ui.autocomplete.escapeRegex( request.term ), "i" );
        response( $.grep( names, function( value ) {
          value = value.label || value.value || value;
          return matcher.test( value ) || matcher.test( normalize( value ) );
        }) );
      }
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;form&gt;
  &lt;label for="developer"&gt;开发人员：&lt;/label&gt;
  &lt;input id="developer"&gt;
  &lt;/form&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-folding" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>分类</h2>
<p>分类的搜索结果。尝试键入 "a" 或 "n"。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 分类&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .ui-autocomplete-category {
    font-weight: bold;
    padding: .2em .4em;
    margin: .8em 0 .2em;
    line-height: 1.5;
  }
  &lt;/style&gt;
  &lt;script&gt;
  $.widget( "custom.catcomplete", $.ui.autocomplete, {
    _renderMenu: function( ul, items ) {
      var that = this,
        currentCategory = "";
      $.each( items, function( index, item ) {
        if ( item.category != currentCategory ) {
          ul.append( "&lt;li class='ui-autocomplete-category'&gt;" + item.category + "&lt;/li&gt;" );
          currentCategory = item.category;
        }
        that._renderItemData( ul, item );
      });
    }
  });
  &lt;/script&gt;
  &lt;script&gt;
  $(function() {
    var data = [
      { label: "anders", category: "" },
      { label: "andreas", category: "" },
      { label: "antal", category: "" },
      { label: "annhhx10", category: "Products" },
      { label: "annk K12", category: "Products" },
      { label: "annttop C13", category: "Products" },
      { label: "anders andersson", category: "People" },
      { label: "andreas andersson", category: "People" },
      { label: "andreas johnson", category: "People" }
    ];
 
    $( "#search" ).catcomplete({
      delay: 0,
      source: data
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;label for="search"&gt;搜索：&lt;/label&gt;
&lt;input id="search"&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-categories" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>组合框（Combobox）</h2>
<p>一个由 Autocomplete 和 Button 创建的自定义部件。您可以键入一些字符，来获得基于您的输入过滤的结果，或者使用按钮从完整列表中选择。</p>
<p>该输入是从一个已有的 select 元素中读取，传递给带有自定义的 source 选项的 Autocomplete。</p>
<p>这是一个不被支持的不完美的部件。这里纯粹是为了演示 autocomplete 定制功能。<a href="http://www.learningjquery.com/2010/06/a-jquery-ui-combobox-under-the-hood/" target="_blank" rel="noopener noreferrer">如需了解更多有关该部件工作原理的细节，请点击这里查看相关的 jQuery 文章。</a></p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 组合框（Combobox）&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .custom-combobox {
    position: relative;
    display: inline-block;
  }
  .custom-combobox-toggle {
    position: absolute;
    top: 0;
    bottom: 0;
    margin-left: -1px;
    padding: 0;
    /* 支持： IE7 */
    *height: 1.7em;
    *top: 0.1em;
  }
  .custom-combobox-input {
    margin: 0;
    padding: 0.3em;
  }
  &lt;/style&gt;
  &lt;script&gt;
  (function( $ ) {
    $.widget( "custom.combobox", {
      _create: function() {
        this.wrapper = $( "&lt;span&gt;" )
          .addClass( "custom-combobox" )
          .insertAfter( this.element );
 
        this.element.hide();
        this._createAutocomplete();
        this._createShowAllButton();
      },
 
      _createAutocomplete: function() {
        var selected = this.element.children( ":selected" ),
          value = selected.val() ? selected.text() : "";
 
        this.input = $( "&lt;input&gt;" )
          .appendTo( this.wrapper )
          .val( value )
          .attr( "title", "" )
          .addClass( "custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left" )
          .autocomplete({
            delay: 0,
            minLength: 0,
            source: $.proxy( this, "_source" )
          })
          .tooltip({
            tooltipClass: "ui-state-highlight"
          });
 
        this._on( this.input, {
          autocompleteselect: function( event, ui ) {
            ui.item.option.selected = true;
            this._trigger( "select", event, {
              item: ui.item.option
            });
          },
 
          autocompletechange: "_removeIfInvalid"
        });
      },
 
      _createShowAllButton: function() {
        var input = this.input,
          wasOpen = false;
 
        $( "&lt;a&gt;" )
          .attr( "tabIndex", -1 )
          .attr( "title", "Show All Items" )
          .tooltip()
          .appendTo( this.wrapper )
          .button({
            icons: {
              primary: "ui-icon-triangle-1-s"
            },
            text: false
          })
          .removeClass( "ui-corner-all" )
          .addClass( "custom-combobox-toggle ui-corner-right" )
          .mousedown(function() {
            wasOpen = input.autocomplete( "widget" ).is( ":visible" );
          })
          .click(function() {
            input.focus();
 
            // 如果已经可见则关闭
            if ( wasOpen ) {
              return;
            }
 
            // 传递空字符串作为搜索的值，显示所有的结果
            input.autocomplete( "search", "" );
          });
      },
 
      _source: function( request, response ) {
        var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
        response( this.element.children( "option" ).map(function() {
          var text = $( this ).text();
          if ( this.value &amp;&amp; ( !request.term || matcher.test(text) ) )
            return {
              label: text,
              value: text,
              option: this
            };
        }) );
      },
 
      _removeIfInvalid: function( event, ui ) {
 
        // 选择一项，不执行其他动作
        if ( ui.item ) {
          return;
        }
 
        // 搜索一个匹配（不区分大小写）
        var value = this.input.val(),
          valueLowerCase = value.toLowerCase(),
          valid = false;
        this.element.children( "option" ).each(function() {
          if ( $( this ).text().toLowerCase() === valueLowerCase ) {
            this.selected = valid = true;
            return false;
          }
        });
 
        // 找到一个匹配，不执行其他动作
        if ( valid ) {
          return;
        }
 
        // 移除无效的值
        this.input
          .val( "" )
          .attr( "title", value + " didn't match any item" )
          .tooltip( "open" );
        this.element.val( "" );
        this._delay(function() {
          this.input.tooltip( "close" ).attr( "title", "" );
        }, 2500 );
        this.input.data( "ui-autocomplete" ).term = "";
      },
 
      _destroy: function() {
        this.wrapper.remove();
        this.element.show();
      }
    });
  })( jQuery );
 
  $(function() {
    $( "#combobox" ).combobox();
    $( "#toggle" ).click(function() {
      $( "#combobox" ).toggle();
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label&gt;您喜欢的编程语言：&lt;/label&gt;
  &lt;select id="combobox"&gt;
    &lt;option value=""&gt;请选择...&lt;/option&gt;
    &lt;option value="ActionScript"&gt;ActionScript&lt;/option&gt;
    &lt;option value="AppleScript"&gt;AppleScript&lt;/option&gt;
    &lt;option value="Asp"&gt;Asp&lt;/option&gt;
    &lt;option value="BASIC"&gt;BASIC&lt;/option&gt;
    &lt;option value="C"&gt;C&lt;/option&gt;
    &lt;option value="C++"&gt;C++&lt;/option&gt;
    &lt;option value="Clojure"&gt;Clojure&lt;/option&gt;
    &lt;option value="COBOL"&gt;COBOL&lt;/option&gt;
    &lt;option value="ColdFusion"&gt;ColdFusion&lt;/option&gt;
    &lt;option value="Erlang"&gt;Erlang&lt;/option&gt;
    &lt;option value="Fortran"&gt;Fortran&lt;/option&gt;
    &lt;option value="Groovy"&gt;Groovy&lt;/option&gt;
    &lt;option value="Haskell"&gt;Haskell&lt;/option&gt;
    &lt;option value="Java"&gt;Java&lt;/option&gt;
    &lt;option value="JavaScript"&gt;JavaScript&lt;/option&gt;
    &lt;option value="Lisp"&gt;Lisp&lt;/option&gt;
    &lt;option value="Perl"&gt;Perl&lt;/option&gt;
    &lt;option value="PHP"&gt;PHP&lt;/option&gt;
    &lt;option value="Python"&gt;Python&lt;/option&gt;
    &lt;option value="Ruby"&gt;Ruby&lt;/option&gt;
    &lt;option value="Scala"&gt;Scala&lt;/option&gt;
    &lt;option value="Scheme"&gt;Scheme&lt;/option&gt;
  &lt;/select&gt;
&lt;/div&gt;
&lt;button id="toggle"&gt;显示基础的选择框&lt;/button&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-combobox" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>自定义数据并显示</h2>
<p>您可以使用自定义数据格式，并通过简单地重载默认的聚焦和选择行为来显示数据。</p>
<p>尝试键入 "j"，或者按向下箭头按键，即可得到一个项目列表。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 自定义数据并显示&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  #project-label {
    display: block;
    font-weight: bold;
    margin-bottom: 1em;
  }
  #project-icon {
    float: left;
    height: 32px;
    width: 32px;
  }
  #project-description {
    margin: 0;
    padding: 0;
  }
  &lt;/style&gt;
  &lt;script&gt;
  $(function() {
    var projects = [
      {
        value: "jquery",
        label: "jQuery",
        desc: "the write less, do more, JavaScript library",
        icon: "jquery_32x32.png"
      },
      {
        value: "jquery-ui",
        label: "jQuery UI",
        desc: "the official user interface library for jQuery",
        icon: "jqueryui_32x32.png"
      },
      {
        value: "sizzlejs",
        label: "Sizzle JS",
        desc: "a pure-JavaScript CSS selector engine",
        icon: "sizzlejs_32x32.png"
      }
    ];
 
    $( "#project" ).autocomplete({
      minLength: 0,
      source: projects,
      focus: function( event, ui ) {
        $( "#project" ).val( ui.item.label );
        return false;
      },
      select: function( event, ui ) {
        $( "#project" ).val( ui.item.label );
        $( "#project-id" ).val( ui.item.value );
        $( "#project-description" ).html( ui.item.desc );
        $( "#project-icon" ).attr( "src", "images/" + ui.item.icon );
 
        return false;
      }
    })
    .data( "ui-autocomplete" )._renderItem = function( ul, item ) {
      return $( "&lt;li&gt;" )
        .append( "&lt;a&gt;" + item.label + "&lt;br&gt;" + item.desc + "&lt;/a&gt;" )
        .appendTo( ul );
    };
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div id="project-label"&gt;选择一个项目（请键入 "j"）：&lt;/div&gt;
&lt;img decoding="async" id="project-icon" src="images/transparent_1x1.png" class="ui-state-default" alt=""&gt;
&lt;input id="project"&gt;
&lt;input type="hidden" id="project-id"&gt;
&lt;p id="project-description"&gt;&lt;/p&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-custom-data" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>多个值</h2>
<p>用法：键入一些字符，比如 "j"，可以看到相关的编程语言结果。选择一个值，然后继续键入字符来添加其他的值。</p>
<p>本实例演示如何使用 source 选项和一些事件来实现在一个单一的文本域输入多个自动完成的值。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 多个值&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;script&gt;
  $(function() {
    var availableTags = [
      "ActionScript",
      "AppleScript",
      "Asp",
      "BASIC",
      "C",
      "C++",
      "Clojure",
      "COBOL",
      "ColdFusion",
      "Erlang",
      "Fortran",
      "Groovy",
      "Haskell",
      "Java",
      "JavaScript",
      "Lisp",
      "Perl",
      "PHP",
      "Python",
      "Ruby",
      "Scala",
      "Scheme"
    ];
    function split( val ) {
      return val.split( /,\s*/ );
    }
    function extractLast( term ) {
      return split( term ).pop();
    }
 
    $( "#tags" )
      // 当选择一个条目时不离开文本域
      .bind( "keydown", function( event ) {
        if ( event.keyCode === $.ui.keyCode.TAB &amp;&amp;
            $( this ).data( "ui-autocomplete" ).menu.active ) {
          event.preventDefault();
        }
      })
      .autocomplete({
        minLength: 0,
        source: function( request, response ) {
          // 回到 autocomplete，但是提取最后的条目
          response( $.ui.autocomplete.filter(
            availableTags, extractLast( request.term ) ) );
        },
        focus: function() {
          // 防止在获得焦点时插入值
          return false;
        },
        select: function( event, ui ) {
          var terms = split( this.value );
          // 移除当前输入
          terms.pop();
          // 添加被选项
          terms.push( ui.item.value );
          // 添加占位符，在结尾添加逗号+空格
          terms.push( "" );
          this.value = terms.join( ", " );
          return false;
        }
      });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="tags"&gt;编程语言：&lt;/label&gt;
  &lt;input id="tags" size="50"&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-multiple" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>多个值，远程</h2>
<p>用法：键入至少两个字符来获取鸟的名称。选择一个值，然后继续键入字符来添加其他的值。</p>
<p>本实例演示如何使用 source 选项和一些事件来实现在一个单一的文本域输入多个自动完成的值。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 多个值，远程&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .ui-autocomplete-loading {
    background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat;
  }
  &lt;/style&gt;
  &lt;script&gt;
  $(function() {
    function split( val ) {
      return val.split( /,\s*/ );
    }
    function extractLast( term ) {
      return split( term ).pop();
    }
 
    $( "#birds" )
      // 当选择一个条目时不离开文本域
      .bind( "keydown", function( event ) {
        if ( event.keyCode === $.ui.keyCode.TAB &amp;&amp;
            $( this ).data( "ui-autocomplete" ).menu.active ) {
          event.preventDefault();
        }
      })
      .autocomplete({
        source: function( request, response ) {
          $.getJSON( "search.php", {
            term: extractLast( request.term )
          }, response );
        },
        search: function() {
          // 自定义最小长度
          var term = extractLast( this.value );
          if ( term.length &lt; 2 ) {
            return false;
          }
        },
        focus: function() {
          // 防止在获得焦点时插入值
          return false;
        },
        select: function( event, ui ) {
          var terms = split( this.value );
          // 移除当前输入
          terms.pop();
          // 添加被选项
          terms.push( ui.item.value );
          // 添加占位符，在结尾添加逗号+空格
          terms.push( "" );
          this.value = terms.join( ", " );
          return false;
        }
      });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="birds"&gt;鸟：&lt;/label&gt;
  &lt;input id="birds" size="50"&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-multiple-remote" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>远程 JSONP 数据源</h2>
<p>用法：键入至少两个字符来获取鸟的名称。选择一个值，然后继续键入字符来添加其他的值。</p>
<p>
本实例演示如何使用 jsonp 来获取数据。</p>
<pre>
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
  &lt;title&gt;jQuery UI Autocomplete - Remote JSONP datasource&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  
  &lt;style&gt;
  .ui-autocomplete-loading {
    background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat;
  }
  &lt;/style&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script&gt;
  $( function() {
    function log( message ) {
      $( "&lt;div&gt;" ).text( message ).prependTo( "#log" );
      $( "#log" ).scrollTop( 0 );
    }
 
    $( "#birds" ).autocomplete({
      source: function( request, response ) {
        $.ajax( {
          url: "/try/jqueryui/search.php",
          dataType: "jsonp",
          data: {
            term: request.term
          },
          success: function( data ) {
            response( data );
          }
        } );
      },
      minLength: 2,
      select: function( event, ui ) {
        log( "Selected: " + ui.item.value + " aka " + ui.item.id );
      }
    } );
  } );
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="birds"&gt;Birds: &lt;/label&gt;
  &lt;input id="birds"&gt;
&lt;/div&gt;
 
&lt;div class="ui-widget" style="margin-top:2em; font-family:Arial"&gt;
  Result:
  &lt;div id="log" style="height: 200px; width: 300px; overflow: auto;" class="ui-widget-content"&gt;&lt;/div&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-remote-jsonp" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>远程数据源</h2>
<p>当您在文本域中键入字符时，Autocomplete 部件给出建议结果。在本实例中，当您在文本域中至少键入两个字符时，将显示相关鸟的名称。</p>
<p>在本实例中，数据源是可返回 JSON 数据的服务器端脚本，通过一个简单的 source 选项来指定。另外，minLength 选项设置为 2，避免查询返回太多的结果，select 事件用于显示一些反馈。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 远程数据源&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .ui-autocomplete-loading {
    background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat;
  }
  &lt;/style&gt;
  &lt;script&gt;
  $(function() {
    function log( message ) {
      $( "&lt;div&gt;" ).text( message ).prependTo( "#log" );
      $( "#log" ).scrollTop( 0 );
    }
 
    $( "#birds" ).autocomplete({
      source: "search.php",
      minLength: 2,
      select: function( event, ui ) {
        log( ui.item ?
          "Selected: " + ui.item.value + " aka " + ui.item.id :
          "Nothing selected, input was " + this.value );
      }
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="birds"&gt;鸟：&lt;/label&gt;
  &lt;input id="birds"&gt;
&lt;/div&gt;
 
&lt;div class="ui-widget" style="margin-top:2em; font-family:Arial"&gt;
  结果：
  &lt;div id="log" style="height: 200px; width: 300px; overflow: auto;" class="ui-widget-content"&gt;&lt;/div&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-remote" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>远程缓存</h2>
<p>当您在文本域中键入字符时，Autocomplete 部件给出建议结果。在本实例中，当您在文本域中至少键入两个字符时，将显示相关鸟的名称。</p>
<p>为了提高性能，这里添加了一些本地缓存，其他与远程数据源实例相似。在这里，缓存只保存了一个查询，并可以扩展到缓存多个值，每个条目一个值。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 远程缓存&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .ui-autocomplete-loading {
    background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat;
  }
  &lt;/style&gt;
  &lt;script&gt;
  $(function() {
    var cache = {};
    $( "#birds" ).autocomplete({
      minLength: 2,
      source: function( request, response ) {
        var term = request.term;
        if ( term in cache ) {
          response( cache[ term ] );
          return;
        }
 
        $.getJSON( "search.php", request, function( data, status, xhr ) {
          cache[ term ] = data;
          response( data );
        });
      }
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="birds"&gt;鸟：&lt;/label&gt;
  &lt;input id="birds"&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-remote-with-cache" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>可滚动的结果</h2>
<p>当显示一个长列表的选项时，您可以简单地为 autocomplete 菜单设置 max-height 来防止菜单显示太长。尝试键入 "a" 或 "s" 来获得一个可滚动的长列表的结果。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - 可滚动的结果&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .ui-autocomplete {
    max-height: 100px;
    overflow-y: auto;
    /* 防止水平滚动条 */
    overflow-x: hidden;
  }
  /* IE 6 不支持 max-height
   * 我们使用 height 代替，但是这会强制菜单总是显示为那个高度
   */
  * html .ui-autocomplete {
    height: 100px;
  }
  &lt;/style&gt;
  &lt;script&gt;
  $(function() {
    var availableTags = [
      "ActionScript",
      "AppleScript",
      "Asp",
      "BASIC",
      "C",
      "C++",
      "Clojure",
      "COBOL",
      "ColdFusion",
      "Erlang",
      "Fortran",
      "Groovy",
      "Haskell",
      "Java",
      "JavaScript",
      "Lisp",
      "Perl",
      "PHP",
      "Python",
      "Ruby",
      "Scala",
      "Scheme"
    ];
    $( "#tags" ).autocomplete({
      source: availableTags
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="tags"&gt;标签：&lt;/label&gt;
  &lt;input id="tags"&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-maxheight" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>

<h2>XML 数据</h2>
<p>本实例演示如何获取一些 XML 数据，并使用 jQuery 的方法解析它，然后把它提供给 autocomplete 作为数据源。</p>
<p>本实例也可作为解析远程 XML 数据源的参考 - 解析在每次 source 回调请求时发生。</p>
<pre style="white-space: pre-wrap;">
&lt;!doctype html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
  &lt;meta charset="utf-8"&gt;
  &lt;title&gt;jQuery UI 自动完成（Autocomplete） - XML 数据&lt;/title&gt;
  &lt;link rel="stylesheet" href="../0/jquery-ui.css"&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;script src=""&gt;&lt;/script&gt;
  &lt;link rel="stylesheet" href="../0/style.css"&gt;
  &lt;style&gt;
  .ui-autocomplete-loading { background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat; }
  &lt;/style&gt;
  &lt;script&gt;
  $(function() {
    function log( message ) {
      $( "&lt;div/&gt;" ).text( message ).prependTo( "#log" );
      $( "#log" ).attr( "scrollTop", 0 );
    }
 
    $.ajax({
      url: "/try/jqueryui/london.xmllondon.xml",
      dataType: "xml",
      success: function( xmlResponse ) {
        var data = $( "geoname", xmlResponse ).map(function() {
          return {
            value: $( "name", this ).text() + ", " +
              ( $.trim( $( "countryName", this ).text() ) || "(unknown country)" ),
            id: $( "geonameId", this ).text()
          };
        }).get();
        $( "#birds" ).autocomplete({
          source: data,
          minLength: 0,
          select: function( event, ui ) {
            log( ui.item ?
              "Selected: " + ui.item.value + ", geonameId: " + ui.item.id :
              "Nothing selected, input was " + this.value );
          }
        });
      }
    });
  });
  &lt;/script&gt;
&lt;/head&gt;
&lt;body&gt;
 
&lt;div class="ui-widget"&gt;
  &lt;label for="birds"&gt;London 匹配：&lt;/label&gt;
  &lt;input id="birds"&gt;
&lt;/div&gt;
 
&lt;div class="ui-widget" style="margin-top:2em; font-family:Arial"&gt;
  结果：
  &lt;div id="log" style="height: 200px; width: 300px; overflow: auto;" class="ui-widget-content"&gt;&lt;/div&gt;
&lt;/div&gt;
 
 
&lt;/body&gt;
&lt;/html&gt;
</pre>
<p><a href="../try/tryit.php?filename=jqueryui-example-autocomplete-xml" target="_blank" rel="noopener noreferrer"><button class="tryitbtn">查看演示</button></a></p>			<!-- 其他扩展 -->
						
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